| Re: image spectral resampling [message #71615] |
Fri, 09 July 2010 15:42 |
Maxwell Peck
Messages: 61
Registered: February 2010
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On Jul 9, 1:10 am, Image analysis novice <shilp...@gmail.com> wrote:
> I am trying to resample a hyperspectral image to Worldview-2 's
> wavelengths. I'm not sure how to do this. I have used Spectral ->
> Spectral resampling option in ENVI for satellites such as Ikonos and
> Quickbird but without knowing the filter function for Worldview how
> can I get my task done?
>
> Thanks!
Resampling Spectral Data Files
Use Spectral Resampling to resample spectral data files to match
either the response of a known instrument (for example, TM, MSS, or
AVIRIS), a user-defined filter function, an ASCII wavelength file
(with or without FWHM information), or the wavelengths of a specific
image input file. The resampling method you use depends on the input
information. If you only provide wavelengths (band centers), ENVI
assumes critical sampling and uses a Gaussian model with an FWHM equal
to the band spacings. If you provide wavelengths and FWHM information,
ENVI uses a Gaussian model with FWHM spacings. If you provide a filter
function, ENVI uses that for the resampling.
From the ENVI main menu bar, select Spectral Spectral Resampling. See
Selecting Resampling Types for the remaining steps.
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